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V. A. GANSHIN, V. SH. IVANOV3), Y U . N. KORKISHKO, and T. V. MOROZOVA The possibility is found of Cu: LiTaO, waveguides forming by ion exchange technique in salt melts at temperatures below the Curie point of lithium tantalate. By the complex studies of doped layers some regularities are established and specific features of two probable types of exchange processes in X-, Y-, and Z-cut plates of crystals: Cut F? Li+ and Cuzt s 2 Li'. nOKa3aHa B03MOXHOCTb I$OpMApOBaHHfl CU : LiTaO, CBeTOBOAOB MeTOAOM AOHHOrO 06MeHa B JIerApOBaHHbIX CnOeB A YCTaHOBneHbI HeKOTOpbIe 3aKOHOMepHOCTII €4 OCO6eHHOCTA IIpOTeKaHMfl ABYX BepORTHbIX npOUeCCOB 06MeHa B x-, Y-, Z-Cpe3aX KpACTaJlJIOB: CU' @ Li+ A c U 2 + pacnnasax coneii npa TeMnepaTypax HAxe TOYKR Kmpa. npoBeneHb1 KoMnneKCHbIe AccneAoBaHafl 2 Li'. Methods of ResearchWaveguiding Cu: LiTaO, layers were obtained by processing X-, Y-, and Z-cut lithium tantalate plates in melts of inorganic salts of two systems: (I) a system with eutectic composition CuCl + KCI (65 mol% of CuCl) at temperatures T = 300 to 350 "C for 1 to 4 h, and (11) a salt mixture CuSO, + K, Na, Zn I/ SO, (1.4 mol% of CuSO,) at T = 390 ') SU-103498 Moscow, USSR. ' ) SU-103498 Moscow, NIIFP. 3, Leningrad, NPO "Burevestnik".

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